Java Archive

Programmers agonize over whether to allocate on the stack or on the heap. Some people think garbage collection will never be as efficient as direct memory management, and others feel it is easier to clean up a mess in one big batch than to pick up individual pieces of dust throughout the day. This article pokes some holes in the oft-repeated performance myth of slow allocation in JVMs.

If you're doing Java Web development using Asynchronous JavaScript and XML, then delivering data from the server to the client is probably your top concern. This article focuses on what matters most for many Java Web developers, producing data for the client, and walks you through five approaches to Java object serialization. It will give you all the information you need to choose the data format and technology best suited to your application.

The Apache Software Foundation has announced the release of Beehive 1.0, its component toolkit for J2EE and Struts. Beehive is aimed at making it easier to develop Web applications in Java by reducing the amount of coding needed to produce a working application.

Cloudscape is a freely available repackaging of the Apache Derby relational database manager. Its implemented in Java, and integrates cleanly and will run unaltered anywhere a J2EE Server will run. Most J2EE applications require that a JDBC-compliant database be integrated with the Server to store information. This article shows how to best fit Cloudscape or Derby into a J2EE environment.

This series of articles teaches you about creating applications using Java technology, Eclipse, and the SWT and JFace libraries. In SWT and JFace Part 3 find out how to use tabular tree, canvas, styled text, slider, spinner, scale and other controls, as well as stack layouts. You might want to look at previous articles in this series. In SWT and JFace Part 1 learn how to to create simple SWT GUIs using Eclipse, Java, basic JFace controls and layouts. In SWT and JFace Part 2, learn how to use combo, list, table, and tree controls, as well as form layouts and reusable helper methods.

The Bluetooth protocol stack lets you use several methods, including RFCOMM and Object Exchange (OBEX), to send and receive files between devices. Become familiar with the Java language library used to control a Bluetooth device and learn how to use JSR-82 API. OBEX is great way to send object data, context, and metadata about the payload.

Built upon Apache's Geronimo J2EE 1.4 server based on open source components, Gluecode is an application server platform that encompasses key open source projects and groups them together in a layered architecture. This article takes a look at Gluecode for beginners, explains how it is composed, and how Gluecode can help organizations plan for more effeciate IT infrastructure.

"Thinking of migrating to the Java 2 Platform, Standard Edition 5.0, code-named Tiger? You're not alone. Thousands of companies all over the world are giving J2SE 5.0 a try, and they like what they see. New language features, enhanced class libraries, better tool support, and desktop enhancements are just some of the reasons why many companies are making the switch. In this article, we talk with Li Moore, software engineer at Google, about his company's switch from J2SE version 1.4 to 5.0."

The Java programming language is powerful, but it has significant limitations for lightweight development. For certain problems, other programming languages such as Ruby may lead to better productivity. This article shows you what's important for productivity in an application's language.

Global Business Object (GBO) is a technology that provides a portable Java library enabling developers to generate culture-sensitive GUI controls in a J2EE environment. Currently, GBO includes five globalization features: Name, Address, Pop-up Calendar, Date Chooser, and Time Chooser and supports 24 languages and their corresponding locales.

"We are pleased to announce a new developer snapshot of GNU Classpath. GNU Classpath, essential libraries for java, is a project to create free core class libraries for use with runtimes, compilers and tools for the java programming language."

Sun Microsystems has quietly open-sourced its web user interface building tool: JavaServer Faces 1.2. Sun released the source code last week under the company's CDDL.

Smart cards take the functions you've come to expect in magnetic swipe cards to a whole new level: they can contain a large amount of data and even executable programs. The Java Card spec brings the power of the Java language to smart cards. This article shows you how to use the Java Card to build Kerberos-based security to a mobile application with Java Card applets.

Geronimo is one of the more complex projects undertaken by the open source community, comparable to Linux in its intricacy. One of Geronimo's principal goals is J2EE 1.4 certification - a time-consuming effort. Nevertheless, Geronimo has already issued several milestone releases and is moving steadily toward the magical 1.0 release. Peek behind the curtain and see how the Geronimo deployment model brings a number of different open source projects under one umbrella.